noon vs upsun

noon

noun
  • The time of day when the sun is in its zenith; twelve o'clock in the day, midday. 

  • The highest point; culmination. 

  • The letter ن in the Arabic script. 

verb
  • To relax or sleep around midday 

upsun

noun
  • The time during which the sun is up, or above the horizon; the time between sunrise and sunset. 

How often have the words noon and upsun occurred in a corpus of books? (source: Google Ngram Viewer )